I am buying an used iPhone 5S off Craiglist. The seller appeared to be honest so I am not suspecting anything fishy. However, when I checked the battery stats on the phone using Lirum Device Info, one of the rare apps still on the App Store that are able to show battery cycles used (a stats that Apple now blocks), it shows that the phone already had a charge cycle of 714! Yet, strangely, the battery wear level was still only at 90% (1398 mAh out of factory max of 1550 mAh). I have not seen such a mismatch before. According to Apple's own guidelines, iPhones typically only have a lifetime charge cycle of about 500 before dropping to 80% wear level. I do not believe the seller would be tech savvy enough to hack the battery stats. The voltage, discharge rate, and other stats looked fine to me. Can someone more knowledgeable about iPhone battery life explain this discrepancy to me? The seller is asking a below market value price, so is this a good phone to buy still? The phone is to be used by the family only to watch YouTube videos and listen to radios in bed.